Not quite sure what you mean here - did something get garbled?
Hi res depends on the mastering, which might use 24 or 32 bits resolution and a higher sample rate. The higher sample rate should be a minimum of 48 kHz, but may be oversampled up to 96, 192 or even higher.
Some discs have been sampled at other frequencies - typically multiples of the 44.1 kHz used for CDs.
The encoding does not have to create very large numbers of consecutive zeroes or ones in the bit stream - depending on what approach to encoding and decoding is used.
SACD players probably do not use PCM for the SACD layer, though ultimately they should still drive a standard PCM DAC.
Re sound quality - some people say that a very good CD sounds as good as an SACD or even better, but there are too many possible variables to be sure. Others say that SACDs or even Blu Ray audio sound better.
There are also differences in the circuits and algorithms used, and sometimes perceived quality differences may just come down to one piece of kit being better made [whatever that is] than another - and not really much to do with the CD vs SACD vs Blu Ray at all.
I have heard, but not checked, that most Sony Blu Ray players will also play SACDs - and are good. We do have one - but I just never got round to testing it with SACDs.
GIven the situation it is probably best to audition some kit before deciding what to buy. Some of the Oppo kit - before Oppo pulled out of the rotating disc markets - was reportedly very good - though it may still be expensive in second hand markets.